CN113446146A - Online water turbine efficiency test method - Google Patents
Online water turbine efficiency test method Download PDFInfo
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- CN113446146A CN113446146A CN202110679365.1A CN202110679365A CN113446146A CN 113446146 A CN113446146 A CN 113446146A CN 202110679365 A CN202110679365 A CN 202110679365A CN 113446146 A CN113446146 A CN 113446146A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 51
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 18
- 238000004364 calculation method Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/008—Measuring or testing arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses an on-line water turbine efficiency test method, which belongs to the technical field of hydropower and comprises the following steps: the method comprises the steps of reading and storing the running state, corresponding running condition parameters and measured data of the hydroelectric generating set based on an online monitoring system of the hydroelectric generating set, then judging whether the read data are data in a power generation state and a stable condition in sequence, and processing, calculating and analyzing the screened data so as to finish a hydraulic turbine efficiency test. The method avoids the defect of carrying out the on-site test, ensures the safe and stable operation of the unit, and improves the working efficiency and the economic benefit.
Description
Technical Field
The invention relates to an on-line water turbine efficiency test method, and belongs to the technical field of hydropower.
Background
The hydroelectric generating set performance test mainly comprises a model test and a prototype test: the model test has the advantages of high precision, low cost, easy operation of working condition change, no limitation of production and natural conditions and the like, and is widely applied to the design process of the hydroelectric generating set; because of the influence of the manufacturing, installation level, actual operation and the like of the real machine, certain difference necessarily exists in the performances of the real machine and the model unit, so that the performance of the real machine cannot be comprehensively and truly reflected by the result of the model test. Therefore, only a true machine test (prototype test) can be taken to solve the actual performance of the plant.
At present, a local test mode is still adopted in the related performance test of the hydroelectric generating set, most hydroelectric generating plants are far away, the traffic is inconvenient, the local test work efficiency is not high, the travel manpower, time and test cost are high, and the installation of local test equipment also has potential safety hazards.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an online water turbine efficiency test method, which is used for reading, processing and analyzing the running state, corresponding running condition parameters and measured data of a hydroelectric generating set based on an online monitoring system of the hydroelectric generating set so as to finish a water turbine efficiency test. The method avoids the power plant applying corresponding load to the power grid, does not influence the power generation of the power plant, and does not need the unit to stop, install and disassemble the test equipment. The defect of carrying out the on-site test is avoided, the safe and stable operation of the unit is ensured, and the working efficiency and the economic benefit are improved.
The technical scheme adopted by the invention for solving the problems is as follows: an on-line water turbine efficiency test method is characterized by comprising the following steps:
the method comprises the following steps: reading real-time operation data of the hydroelectric generating set based on an online monitoring system of the hydroelectric generating set, acquiring the operation state of the hydroelectric generating set, corresponding operation condition parameters and actual measurement data, and providing basic information for an efficiency test; the operation state comprises the following steps: generating state, no-load state, idle state and shutdown state; the operation condition parameter actual measurement data comprises the following steps: the running time, the unit active power, the upstream and downstream water levels, the guide vane opening, the flow, the volute inlet section pressure, the power factor and the like.
Step two: dividing the read data by setting power factors, unit active power, upstream and downstream water levels:
the read data are divided by setting power factors, unit active power, upstream and downstream water levels, and the power factors, the unit active power, the upstream and downstream water levels can be divided by simultaneously meeting the following conditions:
wherein t1 is continuous time, PSetting upActive for manually set units in screening data, HSetting upFor manually setting upstream and downstream water levels, H, during data screeningtA is the set power factor for water levels upstream and downstream of the time.
Step three: and D, judging whether the data in the step two are under the stable working condition, wherein the judgment formula is as follows:
in the formula, PSetting upActive power of the unit set manually for screening data, t continuous time (set according to test conditions, generally not less than 10 minutes), PtThe unit has active power at time t. Extracting 5 min data under a stable working condition as original data of an efficiency test;
step four: and (3) carrying out related test parameter calculation on the original test data in the third step, wherein the related test parameter calculation comprises the following technical parameters:
(1) working head calculation
According to the read volute inlet section pressure and the read downstream water level, calculating the working water head of the water turbine according to the following formula:
in the formula: z1、P1-volute inlet pressure transmitter installation elevation (m) and pressure value (kPa);
Z2、P2-installation elevation (m) and pressure value (kPa) of the tail water outlet pressure transmitter;
gamma-volume weight of water (kN/m)3)；
Q-flow (m)3/s)；
A1Volute inlet cross-sectional area (m)3)；
A2Cross-sectional area of tail water outlet (m)3)；
g-acceleration of gravity (m/s)2)；
(2) Hydraulic turbine efficiency calculation
In the formula: ng-units active (kW);
ηu-unit efficiency (%);
q-flow (m)3/s)。
ηt＝ηu/ηg
In the formula: etat-turbine efficiency (%);
ηg-generator efficiency (%);
ηg canAnd consulting according to a generator efficiency curve chart provided by an equipment manufacturer.
(3) Operating parameter conversion
When the same water head efficiency test is carried out, conversion is carried out according to the unchanged efficiency:
in the formula: q' -flow (m) converted to mean operating head3/s)；
Ng' -converting the unit output (kW) to the average operating head;
Hnav-average working head (m).
(4) Water consumption rate calculation of unit
Wherein: q-water consumption rate of unit (m)3/kW·h)。
Step five: and drawing a water turbine efficiency test curve and a water consumption rate curve, and generating a test report.
Compared with the prior art, the invention has the following advantages and effects:
1. the method comprises the steps that operation data of the hydroelectric generating set are obtained based on an online monitoring system of the hydroelectric generating set, no in-situ test equipment or instrument is required to be installed, and potential safety hazards caused by installation of equipment are avoided; 2. the running data of the hydroelectric generating set is obtained based on the online monitoring system of the hydroelectric generating set, traveling manpower is not needed, and the test cost is reduced; 3. the unit operation data is acquired based on the online monitoring system of the hydroelectric generating set, the power plant does not need to apply for scheduling, shut down of the unit and the like, and the economic benefit of the power plant is improved; 4. the working efficiency is improved.
Drawings
FIG. 1 is a flow chart of a method of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, in this embodiment, the hydroelectric generating set online monitoring system realizes acquisition of the operating state and the operating data of the hydroelectric generating set, and transmits data information to the hydroelectric generating set efficiency test system. The hydroelectric generating set efficiency test system judges, preprocesses and stores the acquired data information, calculates each technical parameter of the hydraulic turbine efficiency test, finishes test curve drawing and test result analysis, generates a test report, provides basis and reference data for safe, stable and efficient operation of the hydroelectric generating set, and correctly guides the actual production of the hydroelectric power plant.
In this embodiment, an online water turbine efficiency test method includes the following steps:
the method comprises the following steps: reading real-time operation data of the hydroelectric generating set based on an online monitoring system of the hydroelectric generating set, acquiring the operation state of the hydroelectric generating set, corresponding operation condition parameters and actual measurement data, and providing basic information for an efficiency test; the operation state comprises the following steps: generating state, no-load state, idle state and shutdown state; the operation condition parameter actual measurement data comprises the following steps: the running time, the unit active power, the upstream and downstream water levels, the guide vane opening, the flow, the volute inlet section pressure, the power factor and the like.
Step two: dividing the read data and storing the data by setting a power factor, the unit active power, the upstream water level and the downstream water level, and returning to the first step to continuously (or re) read the data when the test conditions are not met;
the read data are divided by setting power factors, unit active power, upstream and downstream water levels, and the power factors, the unit active power, the upstream and downstream water levels can be divided by simultaneously meeting the following conditions:
wherein t1 is continuous time, PSetting upActive for manually set units in screening data, HSetting upFor manually setting upstream and downstream water levels, H, during data screeningtA is the set power factor for water levels upstream and downstream of the time.
Step three: and D, judging whether the data in the step two are under the stable working condition, wherein the judgment formula is as follows:
in the formula, PSetting upActive power of the unit set manually for screening data, t continuous time (set according to test conditions, generally not less than 10 minutes), PtThe unit has active power at time t. Extracting 5 min data under a stable working condition as original data of an efficiency test;
step four: and (3) carrying out related test parameter calculation on the original test data in the third step, wherein the related test parameter calculation comprises the following technical parameters:
(1) working head calculation
According to the read volute inlet section pressure and the read downstream water level, calculating the working water head of the water turbine according to the following formula:
in the formula: z1、P1-volute inlet pressure transmitter installation elevation (m) and pressure value (kPa);
Z2、P2-installation elevation (m) and pressure value (kPa) of the tail water outlet pressure transmitter;
gamma-volume weight of water (kN/m)3)；
Q-flow (m)3/s)；
A1Volute inlet cross-sectional area (m)3)；
A2Cross-sectional area of tail water outlet (m)3)；
g-acceleration of gravity (m/s)2)；
(2) Hydraulic turbine efficiency calculation
In the formula: ng-units active (kW);
ηu-unit efficiency (%);
q-flow (m)3/s)。
ηt＝ηu/ηg
In the formula: etat-turbine efficiency (%);
ηg-generator efficiency (%);
ηg canAnd consulting according to a generator efficiency curve chart provided by an equipment manufacturer.
(3) Operating parameter conversion
When the same water head efficiency test is carried out, conversion is carried out according to the unchanged efficiency:
in the formula: q' -flow (m) converted to mean operating head3/s)；
Ng' -converting the unit output (kW) to the average operating head;
Hnav-average working head (m).
(4) Water consumption rate calculation of unit
Wherein: q-water consumption rate of unit (m)3/kW·h)。
Step five: and drawing a water turbine efficiency test curve and a water consumption rate curve, and generating a test report.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (3)
1. An on-line water turbine efficiency test method is characterized by comprising the following steps:
the method comprises the following steps: reading real-time operation data of the hydroelectric generating set based on an online monitoring system of the hydroelectric generating set, acquiring the operation state of the hydroelectric generating set, corresponding operation condition parameters and actual measurement data, and providing basic information for an efficiency test;
step two: dividing the read data and storing the data by setting a power factor, the unit active power, the upstream water level and the downstream water level, and returning to the first step to continue or read the data again when the test conditions are not met;
step three: and D, judging whether the data in the step two are under the stable working condition, wherein the judgment formula is as follows:
in the formula, PSetting upThe unit is active and is manually set during data screening, t is continuous time, PtThe unit has active power at the moment t;
step four: and (3) carrying out related test parameter calculation on the original test data in the third step, wherein the related test parameter calculation comprises the following technical parameters:
(1) working head calculation
According to the read volute inlet section pressure and the read downstream water level, calculating the working water head of the water turbine according to the following formula:
in the formula: z1、P1-volute inlet pressure transmitter installation elevation (m) and pressure value (kPa);
Z2、P2-installation elevation (m) and pressure value (kPa) of the tail water outlet pressure transmitter;
gamma-volume weight of water (kN/m)3)；
Q-flow (m)3/s)；
A1Volute inlet cross-sectional area (m)3)；
A2Cross-sectional area of tail water outlet (m)3)；
g-acceleration of gravity (m/s)2)；
(2) Hydraulic turbine efficiency calculation
In the formula: ng-units active (kW);
ηu-unit efficiency (%);
q-flow (m)3/s)；
ηt＝ηu/ηg
In the formula: etat-turbine efficiency (%);
ηg-generator efficiency (%);
ηg canConsulting according to a generator efficiency curve graph provided by an equipment manufacturer;
(3) operating parameter conversion
When the same water head efficiency test is carried out, conversion is carried out according to the unchanged efficiency:
in the formula: q' -flow (m) converted to mean operating head3/s)；
Ng' -converting the unit output (kW) to the average operating head;
Hnav-average working head (m);
(4) water consumption rate calculation of unit
Wherein: q-water consumption rate of unit (m)3/kW·h)；
Step five: and drawing a water turbine efficiency test curve and a water consumption rate curve, and generating a test report.
2. The on-line turbine efficiency testing method as claimed in claim 1, wherein in the step one, the operation state includes: generating state, no-load state, idle state and shutdown state; the operation condition parameter actual measurement data comprises the following steps: the running time, the unit active power, the upstream and downstream water levels, the guide vane opening, the flow, the volute inlet section pressure and the power factor.
3. The on-line water turbine efficiency test method according to claim 1, characterized in that in the second step, the read data is divided by setting power factor, unit active power, upstream and downstream water levels, and the power factor, the unit active power, the upstream and downstream water levels must simultaneously satisfy the following conditions:
wherein t1 is continuous time, PSetting upActive for manually set units in screening data, HSetting upFor manually setting upstream and downstream water levels, H, during data screeningtA is the set power factor for water levels upstream and downstream of the time.
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Cited By (2)
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| CN114165382A (en) * | 2021-11-24 | 2022-03-11 | 华电电力科学研究院有限公司 | Method and system for testing absolute efficiency of hydroelectric generating set |
| CN116593046A (en) * | 2023-07-17 | 2023-08-15 | 河海大学 | Method and device for determining descending efficiency of water turbine and electronic equipment |
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Application publication date: 20210928 |